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I want to create a list of all possible relationships between certain things. java - All possible combinations of an array - Stack Overflow Lets say, I have the following two columns of data, and now, I want to generate a list of all possible combinations based on the two lists of values as left screenshot shown. Increases your productivity by 50%, and reduces hundreds of mouse clicks for you every day. This is a 'combination with repetition' problem. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Anyway's, a nice solution, thanks a lot a gain! Sets are a unique data structure in Python that require each item to be unique. List or generate all possible combinations from two lists with formula, List or generate all possible combinations from three or more lists with VBA code, List or generate all possible combinations from multiple lists with a powerful feature. Every letter displayed in the nCr calculator represents a distinct color of a ball, e.g., A is red, B is yellow, C is green, and so on. Is there a similar approach to estimating the number of combinations in the above example with balls? Microsoft and the Office logo are trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries. You can add a space by adding " "& before you index column B, right after the existing &, like so.. Is KuTools able to sort cells in a row in a "simple combination" fashion? Why are players required to record the moves in World Championship Classical games? Now, let's suppose that you pick one ball, write down which color you got, and put it back in the bag. You will benefit much more by discovering your own solutions. The number of combinations is always smaller than the number of permutations. @JamesVickery yes, you could look at either making a list outside of the function and appending to that, or (better) make the function a generator, have a look at the 'yield' keyword :). Or, in other words, how many different combinations can you get? The combination probability is then: If you draw three random balls from the bag, in 75% of cases, you'll pick a red ball. Well, this is how probability works! You draw three balls out of four, and you check whether there is a red ball or not (like in the first example of this section). I would guess that confuses people that come to python from the branch of mathematics, as it did to me this time. . - combination definition, How to calculate combinations? This implementation is only for simplicity and portability to most other languages. All Possible Combinations and Permutations Generator anyone know how to modify this to reflect 6 columns of data? How many distinct sets of balls can you get? How to list or generate all possible combinations in Excel? - ExtendOffice